Leisure Suit Larry 4 The Missing Floppies was never released. In first Larry's 1991 remake, when you finish the game, Ken Williams comes out and tells about the rest of the Leisure Suit Larry games available, saying the 4th part would never be released since their coders simply lost the floppies.

Leisure Suit Larry 6 Shape-Up Or Slip Out went out in 1993, with larger levels than ever (unlike the 5th, you could actually walk around the whole level freely) - oh, and it had a "Retry" button once you've died, matching up with Lucas Arts' adventure games of that time. It also was the first Leisure Suit Larry to be released with a CD version (in addition to the floppies version) in 1994, with Jan Rabson as the voice of Larry.